Development of inovative device with non-destructive type for the slow extraction

2023 Fiscal Year Final Research Report

• Project/Area Number: 20K03993
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 15020:Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics
• Research Institution: High Energy Accelerator Research Organization
• Principal Investigator: Shimogawa Tetsushi 大学共同利用機関法人高エネルギー加速器研究機構, 加速器研究施設, 助教 (30837399)
• Co-Investigator(Kenkyū-buntansha): 原田 寛之 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 J－PARCセンター, 副主任研究員 (30601174)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: 陽子加速器 / 遅い取り出し / ビームロス / 静電セプタム / ビーム非破壊

Outline of Final Research Achievements

In the "slow extraction", the accelerated beam is spread out and close to a device called an electrostatic septum, which separates the beam into the circumferential and extraction sides while gradually shaving the circumferential side. Therefore, in principle, it is impossible to avoid collisions of the beam with electrodes and wires installed at the boundary between the circumferential and extraction sides, which limits the extraction efficiency and limits the beam output due to damage to the device and activation of the device. In this study, we developed an electrostatic septum that does not place any material at the extraction boundary. As a result of testing the basic characteristics and tuning the calculation model in a test using a small test machine, we found the possibility of developing a beam non-destructive electrostatic septum with beam separation.

Free Research Field

陽子加速器

Academic Significance and Societal Importance of the Research Achievements

ビーム非破壊型静電セプタムの小型試験機による試験において基礎特性の試験、計算モデルの研鑽を行い、十分なビーム分離能力を有すること、研鑽したモデルを用いてビームシミュレーションを行い、ビームロスの低減が可能であることが示唆された。これは国内に限らず、世界の粒子加速器における遅い取り出し手法におけるビーム出力の制限および機器の故障、放射化のリスクの低減に対しての革新的なブレイクスルーとなる。